Initial Setup

User Entity
Secure Users

Added a User entity that is used to salt and store admin passwords.
Register Accounts

Made it possible for people to register accounts as users. Fixed some
style and fixed the favicon.
Access Denied

Better Access Denied handling.
BioUserBundle initial setup
User Management

Added ability for super admins to manage users.
Merge pull request #8 from dmhurley/user-branch

User branch